No More Learning

LXXI
This while the fierce           never cease,
But sternly still maintain a threefold charge,
And gainst the clouds of shafts draw nigh at ease,
Under a pentise made of many a targe,
The armed towers close to the bulwarks press,
And strive to grapple with the battled marge,
And launch their bridges out, meanwhile below
With iron fronts the rams the walls down throw.